High Treason is a 1928 film based on a play by Noel Pemberton Billing. Set in the London of the “future” (the 1950s), the film features cigar-shaped cars and airships over a skyline rather more like that of New York City. The plot resolved about a “Peace League” battling a band of evil agitators while the world’s superpowers stand on the brink of devastating war.

Perhaps more “retro-futuristic” than steampunk (even though there’s dirigibles there!), the film provides an intriguing glimpse into what seemed possible during the Interbellum. As a past projection of the future, it should be of interest to any steampunk enthusiasts, if only because we learn that combat gear of the future includes high heels!